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A new method to reduce common-mode (CM) electromagnetic interference (EMI) emission at the dc input of variable-speed motor drives is presented. Unlike conventional passive or active filtering techniques that rely on impedance mismatch or active noise cancellation, the proposed method uses a passive circuit with matched impedance to cancel the inverter CM current. In the proposed approach, a star-connected...
A new method to reduce common-mode (CM) EMI emission at the dc input of variable-speed motor drives is presented. Unlike conventional passive or active filtering techniques that rely on impedance mismatch or active noise cancellation, the proposed method uses a passive circuit to cancel the CM current produced by the motor drive. In the proposed approach, a start-connected three-phase RC circuit is...
Electromagnetic interference (EMI) filtering is a critical driver for volume and weight for many applications, particularly in airborne and other mobile platforms. Because of the lack of the ability to accurately model system EMI behavior, EMI filter design usually cannot start until EMI measurement results have become available. This often leads to costly schedule delay and disruption, and the resulting...
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